1 files changed, 292 insertions, 0 deletions
diff --git a/nuttx/configs/shenzhou/src/up_touchscreen.c b/nuttx/configs/shenzhou/src/up_touchscreen.c
new file mode 100644
index 000000000..4ed34c0ec
--- /dev/null
+++ b/nuttx/configs/shenzhou/src/up_touchscreen.c
@@ -0,0 +1,292 @@
+/************************************************************************************
+ * configs/shenzhou/src/up_touchscreen.c
+ * arch/arm/src/board/up_touchscreen.c
+ *
+ *   Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <debug.h>
+#include <assert.h>
+#include <errno.h>
+
+#include <nuttx/irq.h>
+#include <nuttx/spi.h>
+#include <nuttx/input/touchscreen.h>
+#include <nuttx/input/ads7843e.h>
+
+#include "stm32_internal.h"
+#include "shenzhou_internal.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+
+#ifdef CONFIG_INPUT_ADS7843E
+#ifndef CONFIG_INPUT
+#  error "Touchscreen support requires CONFIG_INPUT"
+#endif
+
+#ifndef CONFIG_STM32_SPI3
+#  error "Touchscreen support requires CONFIG_STM32_SPI3"
+#endif
+
+#ifndef CONFIG_ADS7843E_FREQUENCY
+#  define CONFIG_ADS7843E_FREQUENCY 500000
+#endif
+
+#ifndef CONFIG_ADS7843E_SPIDEV
+#  define CONFIG_ADS7843E_SPIDEV 3
+#endif
+
+#if CONFIG_ADS7843E_SPIDEV != 3
+#  error "CONFIG_ADS7843E_SPIDEV must be three"
+#endif
+
+#ifndef CONFIG_ADS7843E_DEVMINOR
+#  define CONFIG_ADS7843E_DEVMINOR 0
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct stm32_config_s
+{
+  struct ads7843e_config_s dev;
+  xcpt_t                   handler;
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/* IRQ/GPIO access callbacks.  These operations all hidden behind
+ * callbacks to isolate the ADS7843E driver from differences in GPIO
+ * interrupt handling by varying boards and MCUs.  If possible,
+ * interrupts should be configured on both rising and falling edges
+ * so that contact and loss-of-contact events can be detected.
+ *
+ * attach  - Attach the ADS7843E interrupt handler to the GPIO interrupt
+ * enable  - Enable or disable the GPIO interrupt
+ * clear   - Acknowledge/clear any pending GPIO interrupt
+ * pendown - Return the state of the pen down GPIO input
+ */
+
+static int  tsc_attach(FAR struct ads7843e_config_s *state, xcpt_t isr);
+static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable);
+static void tsc_clear(FAR struct ads7843e_config_s *state);
+static bool tsc_busy(FAR struct ads7843e_config_s *state);
+static bool tsc_pendown(FAR struct ads7843e_config_s *state);
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* A reference to a structure of this type must be passed to the ADS7843E
+ * driver.  This structure provides information about the configuration
+ * of the ADS7843E and provides some board-specific hooks.
+ *
+ * Memory for this structure is provided by the caller.  It is not copied
+ * by the driver and is presumed to persist while the driver is active. The
+ * memory must be writable because, under certain circumstances, the driver
+ * may modify frequency or X plate resistance values.
+ */
+
+static struct stm32_config_s g_tscinfo =
+{
+  {
+    .frequency = CONFIG_ADS7843E_FREQUENCY,
+    .attach    = tsc_attach,
+    .enable    = tsc_enable,
+    .clear     = tsc_clear,
+    .busy      = tsc_busy,
+    .pendown   = tsc_pendown,
+  },
+  .handler     = NULL,
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/* IRQ/GPIO access callbacks.  These operations all hidden behind
+ * callbacks to isolate the ADS7843E driver from differences in GPIO
+ * interrupt handling by varying boards and MCUs.  If possible,
+ * interrupts should be configured on both rising and falling edges
+ * so that contact and loss-of-contact events can be detected.
+ *
+ * attach  - Attach the ADS7843E interrupt handler to the GPIO interrupt
+ * enable  - Enable or disable the GPIO interrupt
+ * clear   - Acknowledge/clear any pending GPIO interrupt
+ * pendown - Return the state of the pen down GPIO input
+ */
+
+static int tsc_attach(FAR struct ads7843e_config_s *state, xcpt_t isr)
+{
+  FAR struct stm32_config_s *priv = (FAR struct stm32_config_s *)state;
+
+  /* Just save the handler for use when the interrupt is enabled */
+
+  priv->handler = handler;
+}
+
+static void tsc_enable(FAR struct ads7843e_config_s *state, bool enable)
+{
+  FAR struct stm32_config_s *priv = (FAR struct stm32_config_s *)state;
+
+  DEBUGASSERT(priv->handler);
+
+  /* Attach and enable, or detach and disable */
+
+  ivdbg("IRQ:%d enable:%d\n", STM32_TCS_IRQ, enable);
+  if (enable)
+    {
+      (void)stm32_gpiosetevent(GPIO_TP_INT, false, true, true,
+                               priv->handler);
+    }
+  else
+    {
+      (void)stm32_gpiosetevent(GPIO_TP_INT, false, true, true, NULL);
+    }
+}
+
+static void tsc_clear(FAR struct ads7843e_config_s *state)
+{
+  /* Does nothing */
+}
+
+static bool tsc_busy(FAR struct ads7843e_config_s *state)
+{
+  /* Hmmm... The ADS7843E BUSY pin is not brought out on the Shenzhou board.
+   * We will most certainly have to revisit this.
+   */
+
+  return false;
+}
+
+static bool tsc_pendown(FAR struct ads7843e_config_s *state)
+{
+  /* REVISIT:  This might need to be inverted */
+
+  bool pendown = stm32_gpioread(GPIO_TP_INT);
+  ivdbg("pendown:%d\n", pendown);
+  return pendown;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: arch_tcinitialize
+ *
+ * Description:
+ *   Each board that supports a touchscreen device must provide this function.
+ *   This function is called by application-specific, setup logic to
+ *   configure the touchscreen device.  This function will register the driver
+ *   as /dev/inputN where N is the minor device number.
+ *
+ * Input Parameters:
+ *   minor   - The input device minor number
+ *
+ * Returned Value:
+ *   Zero is returned on success.  Otherwise, a negated errno value is
+ *   returned to indicate the nature of the failure.
+ *
+ ****************************************************************************/
+
+int arch_tcinitialize(int minor)
+{
+  FAR struct spi_dev_s *dev;
+  int ret;
+
+  idbg("minor %d\n", minor);
+  DEBUGASSERT(minor == 0);
+
+  /* Configure and enable the ADS7843E interrupt pin as an input. */
+
+  (void)stm32_configgpio(GPIO_TP_INT);
+
+  /* Get an instance of the SPI interface */
+
+  dev = up_spiinitialize(CONFIG_ADS7843E_SPIDEV);
+  if (!dev)
+    {
+      idbg("Failed to initialize SPI bus %d\n", CONFIG_ADS7843E_SPIDEV);
+      return -ENODEV;
+    }
+
+  /* Initialize and register the SPI touschscreen device */
+
+  ret = ads7843e_register(dev, &g_tscinfo, CONFIG_ADS7843E_DEVMINOR);
+  if (ret < 0)
+    {
+      idbg("Failed to initialize SPI bus %d\n", CONFIG_ADS7843E_SPIDEV);
+      /* up_spiuninitialize(dev); */
+      return -ENODEV;
+    }
+
+  return OK;
+}
+
+/****************************************************************************
+ * Name: arch_tcuninitialize
+ *
+ * Description:
+ *   Each board that supports a touchscreen device must provide this function.
+ *   This function is called by application-specific, setup logic to
+ *   uninitialize the touchscreen device.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   None.
+ *
+ ****************************************************************************/
+
+void arch_tcuninitialize(void)
+{
+  /* No support for un-initializing the touchscreen ADS7843E device yet */
+}
+
+#endif /* CONFIG_INPUT_ADS7843E */
+